Sickle-grinder



(No Model.) 3 Sheets-Sheet l,

T. GORDGN. SIGKLB GRINDBR.

No. 512,546. Patented Jan. 9, 1894.

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(No Model.) 3 Sheets-Sheet 2.

TQ GORDON. SGKLE GRINDBR.

No. 512,546. Patented Jan. 9, 1894.

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3 Sheets-Sheet 3.

Patented Jan. 9, 1894.

WITNESSES.

\ mensys UNITED STATES PATENT OFFICE.

THOMAS GORDON, OF SOUIH BEND, VYOMING.

SICKLE-GRlNDER.

SPECIFICATION forming part of Letters Patent lo. 512,546, dated January 9, 3.894.

Application filed July 5, i393. Serial NDTBBS. (No model.)

.To @ZZ whom iz? may concern:

Be it known that l, THOMAS GoRDoN, of Sont-h Bend, in the county of Laramie and State of lVyoming, have invented a new and lmp roved Sickle-Grinder, of which the following is a full, clear, and exact description.

My invention relates to an improvement in sickle grinders, and it has for its object to provide a device capable of seing attached to the frame of an ordinary grindstone, and of being used in connection with it, which grinder when used will preserve each and every section of the sickle uniformly true from heel to tcp.

A further object of the invention is to provide a sickle grinder which will be simple, durable and economic in construction, and capable of being manipulated by persons unskilled in the art.

Another feature of the invention is to so construct the machine that the sickle will be supported in proper position against the stone,

being prevented from swinging away from it, and whereby also the carrying barof the sickle may be fed to the right or to the lett to Whatever degree may be required,

The invention consists in the novel construction and combination of the several parts, as will be hereinafter fully set forth and pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar iigures and letters of reference indicate corresponding parts in all the views. Y

Figure l is a perspective View of a grindstone and its stand, illustrating the application of the invention thereto. Fig. 2 is e plan view of the 'base and adj ust-ing plate cf the machine. Fig. 3 is a vertical section taken practically on the line 3-3 of Fig. 2. Fig. s is a plan View of one forni of adjusting traine. Fig. 5 is a vertical section through the said frame,taken practically on the line 5-5 of Fig. 4. Fig. 6 is a broken rear elevation of the sickle carrying bar. Fig. 7 is a perspective view of the machine complete, and illustrating the application of it to an adjusting frame of slightly dierent construction than that shown in Fig. 4. Fig. 8 is a vertical section taken practically on the line 8-8 of Fig. 7; and Fig. il is a partial rear elevation ci the sickle carrying bar, iilustratin g a po rtion of a sickle supported upon and locked to the bar.

ln carryingout the invention the hase plate A, is supported upon a freine il, which trarne may comprise a portion of the frame of a grindstone, if in practice it is found desirable, as shown in Fig. l, and it usually consists of two parallel side beams l0, connected at their outer ends icy a cross bar ll; but the device may be located upon the frame of the grindstone in any suitable or approved manner, one of its sides facing the periphery of the stone. The base plate A, is usually provided in its outer side with a recess l2, and it is adapted to slide upon the frame B from the outer in direction of the inner side of the frame, or vice versa; and to that end guide cleats 13, are formed upon the ends of the cross bars l, the cross bars serving to support the hase plate in a measure, While the cleats extend over the top of the base plate and serve as guides therefor. The cleats are secured upon the beams l0 of the grind stone frame in any suitable or approved manner. .A hed 14, is located upon the base plate A, as shown best in Fig. E. This hed is preferably made somewhat serni-circular upon its inner edge, forining at each end of its inner edge horizontal ears l5. The inner portion of the bed is prefcrably of a width corresponding to that of the hase plate, and the ears extend beyond the inner edge of the base. The bed is adjustably connected with the base plate through the medium of a set screw 16, or its equiva lent, passed through the central portion of the hed, ordinarily nearer its inner than its outer edge, and into a suitable aperture in the base plate. By this means the set screw Vle serves as a pivot for the hed,and by tightening the screw the hed may be held in any position to which it may be laterally adjusted.

As a further means of adjustment, a segmental slot 17, is produced in the central portion of thc bed nearer the outer than the inner face, as is likewise best shown in Fig. 2, and a set screw 1S, is passed through this slot and is screwed into the base. The slot 17, is provided st one of its sides with a Scale 19, said scale being adapted to indicate how far either to the right or to the left the bed may be moved in order to obtain the proper beveled settings for different sized sections of the Sickles. The proper setting of the machine to the beveled edge of the sickle to be operated upon is readily obtained in this manner, and 'when once obtained and the bed is set, no further change is necessary until the opposite side of the section isto be ground; then the bevel for the other side of the section is found by shifting the bed to thc other side and securing it in position bymeans of both of the set screws 16 and 18.

The base A is kept fed to the grind-stone by means of a spring 20, which is connected with a bracket 20, projected ordinarily from the outer cross bar 13" of the grind-stone frame; and the spring is likewise secured to a lug 21, or its equivalent, formed upon the under side of the base, as shown in Fig. 3, the spring acting asaresisting force to the action of the stone when in contact with the section of the sickle being ground.

An adjusting frame is pivotally connected with the bed. The said adjusting frame may be of any approved shape, as for example a U-shaped frame B', as shown in Fig. 4, or a D-shaped frame B2 as illustrated in Fig. 7. The outer or curved portion 22 of the frame in this event serves as a handle or grip for the hand of the operator, since this frame is adapted to be manipulated by hand; and the straight or inner section 23, when the D- frame B2 is used, is provided at each end of the inward extension 24, and in these extensions longitudinally aligningslide ways 25 are made, the slide ways being under cut ateach side, and said slide ways are adapted to receive and have slide vertically therein a sickle carrying bar C'. Then a U-frame B is employed, the slide ways are produced in the extremities of its straight sections or inembers, as shown in Figs. 4 and 5, in which they are designated as 25a. The pivotal connection between the adjusting frame B and the bed is effected by projecting upward from the ears l5 of the bed, lugs 26, and projecting downward from the extensions 24 of the adjusting frame lugs 27; and ordinarily the lugs of the adjusting frame are bifurcated, as shown in Fig. 7, receiving thelugs of the bed, and a pivot pin is passed through the two en gaging lugs.

The sickle bar C, is adapted to receive and hold in position the sickle D to be ground, the sickle being shown in position in Figs. l and E). To that end posts 28 are erected upon the carrying bar, one for example near each end, and these posts are provided with recesses 29 in their inner faces, and with yokes 30, pivotally connected at their outer ends, the yokes being clamped in whatever position they may be set by means of set screws 31, or like devices. At predetermined distances between the end posts 28 angular intermediate posts 28, are placed upon the sickle carrying bar, and have recesses 29 in their inner faces, the intermediate posts being adapted to support the sickle bar intermediate of its ends and thus prevent the bar springing away from the stone during the process of grinding. When placing the sickle bar D in position the cross bar 32 thereof is made to enter the recesses in the posts 28 and 28" andthe clamps of the former posts are carried over the ends of the sickle bar, or any one of its teeth, thereby preventing end movement of the bar.

The sickle carrying bar may be manipulated in diderent-ways, as for example as shown in Figs. 7 and 8, a revolving shaft 33, may be employed, journaled in bearings 34 produced on the frame 2, the D-frame being used. This shaft is provided at its outer end with a hand wheel 35 to facilitate turning it, and at its inner end the shaft carries a pinion 36, and the said pinion meshes with teeth 37 formed upon the under face of the sickle-carrying bar. Thus by turning the wheel 35 the pinion is revolved and the carrying bar is carried the desired distance either to the right or to the left. It is intended that one revolution of the shaft shall carry the sickle to the right or to the left the length of one section.

Instead of operating the sickle-carrying bar through the medium of the shaft 33, said bar may be and in many instances is preferably operated by hand, that is, slid by hand either to the right or to the left. In this event the under face of the carrying bar C is smooth as shown in Fig. (i, although it may be roughened to a greater or less extent; and after the bar has been adjusted it is locked or held in its adjusted position by means of a set screw 38, operated by a hand wheel 39, or its equivalent, a set screw being located just back of each. slide Way, as shown in Figs. l, 4 and. 5, and the screws are made to enter the slide ways in such a manner that the said screws may be carried to a firm contact with the sickle carrying bar. In use the face of the stone E, is maintained perfectly square across its full face, and the sections of the sickles when being ground pass over and across the entire face surface of the stone. The machine while constructed especially for the purpose of grinding mower sickles, can be and is adapted to the uses of an ordinary grind-stone. Then the machine, however, is attached to a grind-stone stand, a pulley 40, is located upon a trunnion or the shaft of the stone, and the said pulley is connected by a chain or other belt 4l, with a second pulley 42, located upon a shaft 43, journaled in the frame of the grind stone below the lower edge of the stone, and the shaft 43 may be revolved by foot power, by means of a 1no tor, or by hand; in the latter event a crank 44, is secured to the shaft 43, and the crank may be operated without in the least interfering with the movements of the grinding attachment.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. In a sickle grinder, an adjustable bed, a

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rocking frame carried by the bed, a sickle carrying bar held to slide in the rocking frame, lookin g devices adapted for engagement with the sickle and located upon the sickle carrying bar, and mechanism for locking the sicklecarryng bar in a fixed position, as and 'for the purpose specified. i

2. In a sickle grinder or like machine, the combination, with a laterally adjustable bed, and a rocking frame supported by the bed, of a sickle carrying bar having sliding movement in the rocking frame, an adjusting device carried by the frame and engaging with the bar, and clamps located upon the bar and adapted as supports for the sickle, as and for the purpose specified.

3. In a sickle grinder or like machine, an adjustable bed, a rocking frame supported by the bed, a sickle carrying bar having sliding movement in the sliding frame, an adjusting mechanism carried by the frame and engaging with the bar, and a clamping mechanism located upon the sickle carrying bar and adapted to receive and hold a sickle in engagement with said bar, and means, substantially as shown and described, for laterally adjusting the rocking frame, as and for the purpose set forth.

4. In a sickle grinder or like machine, the combination, with a sliding spring-controlled base, a bed plate adj ustably pivoted upon the base, and a rocking frame supported by the bed plate, of a sickle carrying bar provided with clamps and having sliding movement in the rocking frame, an adjusting shaft located 1n the rocking frame, and a rack and pinion connection between the sickle carrying bar and the adjusting shaft, as and for the purpose set forth.

5. In a sickle grinder or like machine, the combination, with a movable base, a bed adjnstably located upon the base, a rocking frame carried by the bed, and a sickle carrying bar having sliding movement in the frame, of a hand shaft located in the rocking frame and having a driving connection with the sickle carrying bar, sockets located upon the sickle carrying bar and adapted to receive the sickle, and clamps connected with sundry of the sockets, as and for the purpose speciiied.

6. in a sickle grinder, the combination with a sickle holding bar, of yokes supported from the bar above the same and adapted to embrace a sickle, said yokes being pivoted to swing in the vertical plane and in the direction of the length of the bar, and means for locking the yckes in position, substantially as described.

T. The combination with a grindstoue,of a base plate mounted to slide toward and from the grindstone, a spring normally pressing the base plate in the direction of the grindstone, a handled bed plate carried by the oase plate and pivoted for movement over the face of the latter, a rocking frame pivoted on the bed plate,and a sickle carrier consisting of a sliding car seated in guides on the rocking frame, and provided with clamping devices for the sickle, substantially as described.

THOMAS GORDON.

Witnesses:

JOSEPH G. PRATT, HENRY G. HAY. 

